如何用 Dio 发送 FormData？

Question

您好，我正在使用 Dio 发送 FormData，但是在发送时，网站 returns 出现错误

    var formData = FormData.fromMap({
      "ctl00$ScriptManager1": "ctl00$UpdatePanel1",
      "__EVENTTARGET" :"ctl00$cphPage$productsControl",
      "__EVENTARGUMENT" : "",
      "__LASTFOCUS" : "",
      "PageLoadedHiddenTxtBox" : "Set",
      "Language" : "es-MX",
      "CurrentLanguage" : "es-MX",
      "Currency" : "",
      "__VIEWSTATE" :"/sadasd.....",
      "__VIEWSTATEGENERATOR" : "C0E71A90",
      "ctl00$txtSearch" : "",
      "ctl00$cphPage$productsControl$TopTools$cbxSortType" : "",
      "ctl00$cphPage$productsControl$TopTools$cbxPageSize" : "-1",
      "ctl00$taxes$listCountries" : "54",
      "__ASYNCPOST" : "true",
      " " : ""
    });
var dio = Dio();
    dio.interceptors.add(InterceptorsWrapper(onRequest: (RequestOptions options) async {
      var customHeaders = {
        'content-type': 'text/html; charset=utf-8',
        'application':'x-www-form-urlencoded',
        'Cookie': 'uid=rBQBc2CisZdxWU5XBBmMAg==; ASP.NET_SessionId=tedc4xrih1hk1ykbdzlakuvb; ASPNET_Session=client=BLUR; ShopMSAuth=0102A9A3B88FC919D908FEA90B7DF1D119D908000442004C005500520000012F00FF'
        // other headers
      };
      options.headers.addAll(customHeaders);

      return options;
    }));
    Response response = await dio.post(url, data: formData, options: Options(
        contentType: 'text/html; charset=utf-8',
        followRedirects: true
    ));

    print(response.data);

当我通过浏览器查看请求时，最后的请求有参数：

__ASYNCPOST :true
 :""

表格这样可以吗？

Answer 1

你可以沿着这条路走

var formData = FormData.fromMap({
 'name': 'wendux',
 'age': 25,
 'file': await MultipartFile.fromFile('./text.txt',filename: 'upload.txt')
});
response = await dio.post('/info', data: formData);

如何用 Dio 发送 FormData？

How to send FormData with Dio?

flutter

dio

flutter-android